Interstate 380 is the longest Interstate in Iowa with a three-digit number, running from Iowa City through Cedar Rapids to Waterloo. At 72 miles in length, it serves an important corridor in near-eastern Iowa. On a larger scale, it serves part of the corridor from St. Paul, Minnesota to St. Louis, Missouri, known as the Avenue of the Saints and marked by Iowa Route 27. The southern end is near Coralville and Iowa City, at Interstate 80, though the freeway continues south of Interstate 80 as US Route 218 and Iowa Route 27. North of there, Interstate 380 meets an interchange with US Route 30, which occupies a freeway along the south side of Cedar Rapids; it is at this interchange that US Route 218 departs to the west. Then, Interstate 380 winds through the city center of Cedar Rapids, coming out the north side at a volleyball interchange with Iowa Route 100. Interstate 380 bends northwesterly toward Waterloo, joining US Route 20's freeway for a bit. The concurrency with US Route 20 is short, and Interstate 380, now paired with US Route 218 again, spurs northerly into downtown Waterloo. Interstate 380 only lasts for about another mile, and at the interchange with San Marnan Drive (exit 72), the highway begins encountering signalized at-grade intersections. That's where the Interstate 380 designation ends, but US Route 218 carries on through downtown Waterloo.
For now, I'll just include a couple of photos. But I will soon get some more photos from the Interstates in Iowa so I can provide full exit lists for everyone. Those exit lists will have a photo for every exit. In the meantime, enjoy a short reel of photos.
First of all, though, here is the photo showing where I got my shield image for Interstate 380. The photo's location isn't along Interstate 380 at all; rather, it's along US Route 20 just to the west. The signage you see here faces south at the northern end of Iowa Route 21. It notifies drivers on Iowa Route 21's northbound side that, in order to get to Interstate 380, they can use this onramp to US Route 20 eastbound that's coming up soon. This photo was taken in May 2022. I was looking for other Interstate 380 signs when I was on the same trip, but the best one just happened to be this one that's only tangentially related!